摘要
通过分析单桩成桩后,桩周土体固结渗流的边界条件和初始条件,建立了饱和黏土中单桩桩周及下卧横观各向同性土体的空间轴对称固结问题的定解条件,应用数值理论建立相应定解问题的有限元程序,对桩周及下卧土层中压桩挤土造成的孔压消散的时空变化规律进行模拟研究.结果表明:下卧土层的渗透特性对桩周土体的孔压消散没有明显影响,研究结果对精确分析压桩挤土对桩基础承载力及周围环境影响的时空特点具有理论意义和现实意义.
The temporal and spatial variation of seepage is studied in saturated soil around sunk pile.Considering the initial distribution and boundary condition of excess pore water pressure caused by setting pile,the numerical solutions can be obtained and studied in a simulated way by using the method of establishing the FEM procedures.The result shows that dissipation of pore pressure is not much affected by the variation of permeability of subsoil and has theoretical and practical significance for more accurate analysis of temporal and spatial variation of bearing capacity of pile foundation and environmental influence due to pile squeezing.
出处
《平顶山学院学报》
2011年第5期48-51,74,共5页
Journal of Pingdingshan University
关键词
固结理论
孔压消散
数值模拟
时空变化
consolidation theory
dissipation of pore pressure
numerical simulation
temporal and spatial variation
